"The current-voltage characteristics and partial pressure dependence of defect controlled electrochemical reactions on mixed conducting oxides"

Oxygen exchange reaction rates on mixed conducting perovskite electrodes are described as a function of defect concentrations, see The current-voltage characteristics and partial pressure dependence of defect controlled electrochemical reactions on mixed conducting oxides for a detailed description. Here, (exchange) currents, polarization resistances, \(p_{\rm{O_2}}\) dependencies and Tafel-slopes are calculated as function of \(p_{\rm{O_2}}\) and overpotential for different possible reaction mechnisms. The defect concentrations are taken from the model material La_0.6Sr_0.4FeO_3-\(\delta\), and listed in Brouwer_Bias.csv as a function of \(p_{\rm{O_2}}\) and overpotential. Model 7 describes a molecular mechanisms wothout adsorption limitation, model 8 includes adsorption limitation. Likewise Models 10 and 11 describe atomic mechanisms without and with adsorption limitation, respectively. Overpotentials are listed in V, oxygen partial pressures in bar, defect concentrations in defects per unit cell and currents are in arbitrary units as are resistances. Partial pressure and overpotential dependencies (p and n slopes) are given as \(\frac{\partial \ln j}{\partial\ln p_{\rm{O_2}}}\)(unitless) and \(\frac{\partial \ln j}{\partial\eta}\)(/V), and likewise with resistances instead of currents (rp and rn slopes), respectively. The source code for this project is available at: https://github.com/AlexSchmid22191/EIS_R_Sim